A relative of Tabrez Ansari, who was killed by a mob suspecting he stole a bike, has alleged that Tabrez was given poisonous water.
"After Tabrez was thrashed, he was given water mixed with 'dhatura' (a form of a poisonous leaf)," said Mohammad Masroor, uncle of Tabrez.
"A police chargesheet should be filed immediately and the accused punished", he added.
Eleven people, including the main accused, have been arrested and two police personnel have been suspended in the case.
The Congress, Jharkhand Mukti Morcha (JMM), Rashtriya Janata Dal (RJD) and Left parties staged a sit-in on Wednesday at the Governor House demanding a CBI probe into the incident.
The Minority Commission chairman Mohammad Kamal Khan visited the village on Tuesday.
Tabrez Ansari (22), died in a hospital on Sunday, days after he was brutally thrashed by a mob at Dhatkidih village in Seraikela district on suspicion of stealing a bike on June 17. According to the police, a stolen motorcycle and some other things were also recovered from him.
The incident came to light after a video went viral in which the accused was seen beating Ansari.
Ansari's wife Shaista Parveen lodged a complaint with the Seraikela police station, alleging he was caught by some people while he was on his way back on a bike from Jamshedpur. He was tied to a tree and beaten up brutally and also forced to chant 'Jai Sri Ram'.
After the thrashing, the mob handed him to the police, which took him to a police post. However, he had to be admitted to a hospital after his condition worsened and he died on Sunday.
Ansari's wife has questioned the role of the police in her husband's death, alleging he was not given timely medical treatment.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
10 Years Of Jail For 10 Convicts In Tabrez Ansari's Mob Killing Jharkhand Court Convicts 10, Acquits 2 In Tabrez Ansari's Killing Man Killed By Mob On Suspicion Of Being A Thief: Jharkhand Cops Vandalism At Kolkata Hospital Where Doctor Was Raped, Tear Gas Fired 150 mg Semen In Kolkata Doctor's Body, Suspect Gang-Rape: Parents To Court Starbucks' Indian-Origin CEO, Recently Fired, Never Worked Past 6 pm "Malicious Campaign": Top Kolkata Cop Blames Media For Hospital Vandalism 1.4 Million Afghan Girls Banned From Schools Since Taliban Return To Power US Judge Says "Monopolist" Google Can't Avoid App Store Reforms Track Latest News Live on NDTV.com and get news updates from India and around the world.